Importance

Loading Importance Indicators...

Abstract

An animal fluid injector is provided with a syringe guide, preferably in the form of a pressure jacket, having an open front end through which a replaceable disposable syringe is loadable into and unloadable from, thereby permitting replacement without retraction of the syringe plunger drive or disconnection of the injection tubing. The injector is provided with structure, preferably in the form of thread sections, which mates with cooperating structure on the syringe, to connect and lock the syringe to the injector, preferably by rotational motion of, preferably, less than a full turn, of for example, 90.degree.. In the illustrated embodiment, the structure is at the front end of the guide or at the front periphery of a jacket to connect to threads on a pressure restraining front end of the syringe. A mechanism in the injector, which includes, for example, a key on cam ring provided with a lever that is preferably manually operable with one hand of an operator, interacts with structure such asymmetrically spaced notches on the back end of the syringe to, for example, rotate the syringe and simultaneously translate or rotate a coupling on the syringe plunger into and out of engagement with jaws provided of a plunger drive in the injector.

Loading the Abstract Image...

First Claim